src/mainapp.cpp - openbmc/phosphor-watchdog - Gitiles

 /**
  * Copyright © 2017 IBM Corporation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include "watchdog.hpp"

 #include <CLI/CLI.hpp>
 #include <functional>
 #include <iostream>
 #include <optional>
 #include <phosphor-logging/elog-errors.hpp>
 #include <phosphor-logging/elog.hpp>
 #include <phosphor-logging/log.hpp>
 #include <sdbusplus/bus.hpp>
 #include <sdbusplus/exception.hpp>
 #include <sdbusplus/server/manager.hpp>
 #include <sdeventplus/event.hpp>
 #include <sdeventplus/source/signal.hpp>
 #include <sdeventplus/utility/sdbus.hpp>
 #include <stdplus/signal.hpp>
 #include <string>
 #include <xyz/openbmc_project/Common/error.hpp>

 using phosphor::watchdog::Watchdog;
 using sdbusplus::xyz::openbmc_project::State::server::convertForMessage;

 void printActionTargetMap(const Watchdog::ActionTargetMap& actionTargetMap)
 {
     std::cerr << "Action Targets:\n";
     for (const auto& [action, target] : actionTargetMap)
     {
         std::cerr << "  " << convertForMessage(action) << " -> " << target
                   << "\n";
     }
     std::cerr << std::flush;
 }

 void printFallback(const Watchdog::Fallback& fallback)
 {
     std::cerr << "Fallback Options:\n";
     std::cerr << "  Action: " << convertForMessage(fallback.action) << "\n";
     std::cerr << "  Interval(ms): " << std::dec << fallback.interval << "\n";
     std::cerr << "  Always re-execute: " << std::boolalpha << fallback.always
               << "\n";
     std::cerr << std::flush;
 }

 int main(int argc, char* argv[])
 {
     using namespace phosphor::logging;
     using InternalFailure =
         sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;

     CLI::App app{"Canonical openbmc host watchdog daemon"};

     // Service related options
     const std::string serviceGroup = "Service Options";
     std::string path;
     app.add_option("-p,--path", path,
                    "DBus Object Path. "
                    "Ex: /xyz/openbmc_project/state/watchdog/host0")
         ->required()
         ->group(serviceGroup);
     std::string service;
     app.add_option("-s,--service", service,
                    "DBus Service Name. "
                    "Ex: xyz.openbmc_project.State.Watchdog.Host")
         ->required()
         ->group(serviceGroup);
     bool continueAfterTimeout{false};
     app.add_flag("-c,--continue", continueAfterTimeout,
                  "Continue daemon after watchdog timeout")
         ->group(serviceGroup);

     // Target related options
     const std::string targetGroup = "Target Options";
     std::optional<std::string> target;
     app.add_option("-t,--target", target,
                    "Systemd unit to be called on "
                    "timeout for all actions but NONE. "
                    "Deprecated, use --action_target instead.")
         ->group(targetGroup);
     std::vector<std::string> actionTargets;
     app.add_option("-a,--action_target", actionTargets,
                    "Map of action to "
                    "systemd unit to be called on timeout if that action is "
                    "set for ExpireAction when the timer expires.")
         ->group(targetGroup);

     // Fallback related options
     const std::string fallbackGroup = "Fallback Options";
     std::optional<std::string> fallbackAction;
     auto fallbackActionOpt =
         app.add_option("-f,--fallback_action", fallbackAction,
                        "Enables the "
                        "watchdog even when disabled via the dbus interface. "
                        "Perform this action when the fallback expires.")
             ->group(fallbackGroup);
     std::optional<unsigned> fallbackIntervalMs;
     auto fallbackIntervalOpt =
         app.add_option("-i,--fallback_interval", fallbackIntervalMs,
                        "Enables the "
                        "watchdog even when disabled via the dbus interface. "
                        "Waits for this interval before performing the fallback "
                        "action.")
             ->group(fallbackGroup);
     fallbackIntervalOpt->needs(fallbackActionOpt);
     fallbackActionOpt->needs(fallbackIntervalOpt);
     bool fallbackAlways{false};
     app.add_flag("-e,--fallback_always", fallbackAlways,
                  "Enables the "
                  "watchdog even when disabled by the dbus interface. "
                  "This option is only valid with a fallback specified")
         ->group(fallbackGroup)
         ->needs(fallbackActionOpt)
         ->needs(fallbackIntervalOpt);

     // Should we watch for postcodes
     bool watchPostcodes{false};
     app.add_flag("-w,--watch_postcodes", watchPostcodes,
                  "Should we reset the time remaining any time a postcode "
                  "is signaled.");

     // Interval related options
     uint64_t minInterval = phosphor::watchdog::DEFAULT_MIN_INTERVAL_MS;
     app.add_option("-m,--min_interval", minInterval,
                    "Set minimum interval for watchdog in milliseconds");

     // 0 to indicate to use default from PDI if not passed in
     uint64_t defaultInterval = 0;
     app.add_option("-d,--default_interval", defaultInterval,
                    "Set default interval for watchdog in milliseconds");

     CLI11_PARSE(app, argc, argv);

     // Put together a list of actions and associated systemd targets
     // The new --action_target options take precedence over the legacy
     // --target
     Watchdog::ActionTargetMap actionTargetMap;
     if (target)
     {
         actionTargetMap[Watchdog::Action::HardReset] = *target;
         actionTargetMap[Watchdog::Action::PowerOff] = *target;
         actionTargetMap[Watchdog::Action::PowerCycle] = *target;
     }
     for (const auto& actionTarget : actionTargets)
     {
         size_t keyValueSplit = actionTarget.find("=");
         if (keyValueSplit == std::string::npos)
         {
             std::cerr << "Invalid action_target format, "
                          "expect <action>=<target>."
                       << std::endl;
             return 1;
         }

         std::string key = actionTarget.substr(0, keyValueSplit);
         std::string value = actionTarget.substr(keyValueSplit + 1);

         // Convert an action from a fully namespaced value
         Watchdog::Action action;
         try
         {
             action = Watchdog::convertActionFromString(key);
         }
         catch (const sdbusplus::exception::InvalidEnumString&)
         {
             std::cerr << "Bad action specified: " << key << std::endl;
             return 1;
         }

         // Detect duplicate action target arguments
         if (actionTargetMap.find(action) != actionTargetMap.end())
         {
             std::cerr << "Got duplicate action: " << key << std::endl;
             return 1;
         }

         actionTargetMap[action] = std::move(value);
     }
     printActionTargetMap(actionTargetMap);

     // Build the fallback option used for the Watchdog
     std::optional<Watchdog::Fallback> maybeFallback;
     if (fallbackAction)
     {
         Watchdog::Fallback fallback;
         try
         {
             fallback.action =
                 Watchdog::convertActionFromString(*fallbackAction);
         }
         catch (const sdbusplus::exception::InvalidEnumString&)
         {
             std::cerr << "Bad fallback action specified: " << *fallbackAction
                       << std::endl;
             return 1;
         }
         fallback.interval = *fallbackIntervalMs;
         fallback.always = fallbackAlways;

         printFallback(fallback);
         maybeFallback = fallback;
     }

     try
     {
         // Get a default event loop
         auto event = sdeventplus::Event::get_default();

         // Get a handle to system dbus.
         auto bus = sdbusplus::bus::new_default();

         // Add systemd object manager.
         sdbusplus::server::manager_t watchdogManager(bus, path.c_str());

         // Create a watchdog object
         Watchdog watchdog(bus, path.c_str(), event, std::move(actionTargetMap),
                           std::move(maybeFallback), minInterval,
                           defaultInterval,
                           /*exitAfterTimeout=*/!continueAfterTimeout);

         std::optional<sdbusplus::bus::match_t> watchPostcodeMatch;
         if (watchPostcodes)
         {
             watchPostcodeMatch.emplace(
                 bus,
                 sdbusplus::bus::match::rules::propertiesChanged(
                     "/xyz/openbmc_project/state/boot/raw0",
                     "xyz.openbmc_project.State.Boot.Raw"),
                 std::bind(&Watchdog::resetTimeRemaining, std::ref(watchdog),
                           false));
         }

         // Claim the bus
         bus.request_name(service.c_str());

         auto intCb = [](sdeventplus::source::Signal& s,
                         const struct signalfd_siginfo*) {
             s.get_event().exit(0);
         };
         stdplus::signal::block(SIGINT);
         sdeventplus::source::Signal sigint(event, SIGINT, intCb);
         stdplus::signal::block(SIGTERM);
         sdeventplus::source::Signal sigterm(event, SIGTERM, std::move(intCb));
         return sdeventplus::utility::loopWithBus(event, bus);
     }
     catch (const InternalFailure& e)
     {
         phosphor::logging::commit<InternalFailure>();

         // Need a coredump in the error cases.
         std::terminate();
     }
     return 1;
 }
	/**
	* Copyright © 2017 IBM Corporation
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "watchdog.hpp"

	#include <CLI/CLI.hpp>
	#include <functional>
	#include <iostream>
	#include <optional>
	#include <phosphor-logging/elog-errors.hpp>
	#include <phosphor-logging/elog.hpp>
	#include <phosphor-logging/log.hpp>
	#include <sdbusplus/bus.hpp>
	#include <sdbusplus/exception.hpp>
	#include <sdbusplus/server/manager.hpp>
	#include <sdeventplus/event.hpp>
	#include <sdeventplus/source/signal.hpp>
	#include <sdeventplus/utility/sdbus.hpp>
	#include <stdplus/signal.hpp>
	#include <string>
	#include <xyz/openbmc_project/Common/error.hpp>

	using phosphor::watchdog::Watchdog;
	using sdbusplus::xyz::openbmc_project::State::server::convertForMessage;

	void printActionTargetMap(const Watchdog::ActionTargetMap& actionTargetMap)
	{
	std::cerr << "Action Targets:\n";
	for (const auto& [action, target] : actionTargetMap)
	{
	std::cerr << " " << convertForMessage(action) << " -> " << target
	<< "\n";
	}
	std::cerr << std::flush;
	}

	void printFallback(const Watchdog::Fallback& fallback)
	{
	std::cerr << "Fallback Options:\n";
	std::cerr << " Action: " << convertForMessage(fallback.action) << "\n";
	std::cerr << " Interval(ms): " << std::dec << fallback.interval << "\n";
	std::cerr << " Always re-execute: " << std::boolalpha << fallback.always
	<< "\n";
	std::cerr << std::flush;
	}

	int main(int argc, char* argv[])
	{
	using namespace phosphor::logging;
	using InternalFailure =
	sdbusplus::xyz::openbmc_project::Common::Error::InternalFailure;

	CLI::App app{"Canonical openbmc host watchdog daemon"};

	// Service related options
	const std::string serviceGroup = "Service Options";
	std::string path;
	app.add_option("-p,--path", path,
	"DBus Object Path. "
	"Ex: /xyz/openbmc_project/state/watchdog/host0")
	->required()
	->group(serviceGroup);
	std::string service;
	app.add_option("-s,--service", service,
	"DBus Service Name. "
	"Ex: xyz.openbmc_project.State.Watchdog.Host")
	->required()
	->group(serviceGroup);
	bool continueAfterTimeout{false};
	app.add_flag("-c,--continue", continueAfterTimeout,
	"Continue daemon after watchdog timeout")
	->group(serviceGroup);

	// Target related options
	const std::string targetGroup = "Target Options";
	std::optional<std::string> target;
	app.add_option("-t,--target", target,
	"Systemd unit to be called on "
	"timeout for all actions but NONE. "
	"Deprecated, use --action_target instead.")
	->group(targetGroup);
	std::vector<std::string> actionTargets;
	app.add_option("-a,--action_target", actionTargets,
	"Map of action to "
	"systemd unit to be called on timeout if that action is "
	"set for ExpireAction when the timer expires.")
	->group(targetGroup);

	// Fallback related options
	const std::string fallbackGroup = "Fallback Options";
	std::optional<std::string> fallbackAction;
	auto fallbackActionOpt =
	app.add_option("-f,--fallback_action", fallbackAction,
	"Enables the "
	"watchdog even when disabled via the dbus interface. "
	"Perform this action when the fallback expires.")
	->group(fallbackGroup);
	std::optional<unsigned> fallbackIntervalMs;
	auto fallbackIntervalOpt =
	app.add_option("-i,--fallback_interval", fallbackIntervalMs,
	"Enables the "
	"watchdog even when disabled via the dbus interface. "
	"Waits for this interval before performing the fallback "
	"action.")
	->group(fallbackGroup);
	fallbackIntervalOpt->needs(fallbackActionOpt);
	fallbackActionOpt->needs(fallbackIntervalOpt);
	bool fallbackAlways{false};
	app.add_flag("-e,--fallback_always", fallbackAlways,
	"Enables the "
	"watchdog even when disabled by the dbus interface. "
	"This option is only valid with a fallback specified")
	->group(fallbackGroup)
	->needs(fallbackActionOpt)
	->needs(fallbackIntervalOpt);

	// Should we watch for postcodes
	bool watchPostcodes{false};
	app.add_flag("-w,--watch_postcodes", watchPostcodes,
	"Should we reset the time remaining any time a postcode "
	"is signaled.");

	// Interval related options
	uint64_t minInterval = phosphor::watchdog::DEFAULT_MIN_INTERVAL_MS;
	app.add_option("-m,--min_interval", minInterval,
	"Set minimum interval for watchdog in milliseconds");

	// 0 to indicate to use default from PDI if not passed in
	uint64_t defaultInterval = 0;
	app.add_option("-d,--default_interval", defaultInterval,
	"Set default interval for watchdog in milliseconds");

	CLI11_PARSE(app, argc, argv);

	// Put together a list of actions and associated systemd targets
	// The new --action_target options take precedence over the legacy
	// --target
	Watchdog::ActionTargetMap actionTargetMap;
	if (target)
	{
	actionTargetMap[Watchdog::Action::HardReset] = *target;
	actionTargetMap[Watchdog::Action::PowerOff] = *target;
	actionTargetMap[Watchdog::Action::PowerCycle] = *target;
	}
	for (const auto& actionTarget : actionTargets)
	{
	size_t keyValueSplit = actionTarget.find("=");
	if (keyValueSplit == std::string::npos)
	{
	std::cerr << "Invalid action_target format, "
	"expect <action>=<target>."
	<< std::endl;
	return 1;
	}

	std::string key = actionTarget.substr(0, keyValueSplit);
	std::string value = actionTarget.substr(keyValueSplit + 1);

	// Convert an action from a fully namespaced value
	Watchdog::Action action;
	try
	{
	action = Watchdog::convertActionFromString(key);
	}
	catch (const sdbusplus::exception::InvalidEnumString&)
	{
	std::cerr << "Bad action specified: " << key << std::endl;
	return 1;
	}

	// Detect duplicate action target arguments
	if (actionTargetMap.find(action) != actionTargetMap.end())
	{
	std::cerr << "Got duplicate action: " << key << std::endl;
	return 1;
	}

	actionTargetMap[action] = std::move(value);
	}
	printActionTargetMap(actionTargetMap);

	// Build the fallback option used for the Watchdog
	std::optional<Watchdog::Fallback> maybeFallback;
	if (fallbackAction)
	{
	Watchdog::Fallback fallback;
	try
	{
	fallback.action =
	Watchdog::convertActionFromString(*fallbackAction);
	}
	catch (const sdbusplus::exception::InvalidEnumString&)
	{
	std::cerr << "Bad fallback action specified: " << *fallbackAction
	<< std::endl;
	return 1;
	}
	fallback.interval = *fallbackIntervalMs;
	fallback.always = fallbackAlways;

	printFallback(fallback);
	maybeFallback = fallback;
	}

	try
	{
	// Get a default event loop
	auto event = sdeventplus::Event::get_default();

	// Get a handle to system dbus.
	auto bus = sdbusplus::bus::new_default();

	// Add systemd object manager.
	sdbusplus::server::manager_t watchdogManager(bus, path.c_str());

	// Create a watchdog object
	Watchdog watchdog(bus, path.c_str(), event, std::move(actionTargetMap),
	std::move(maybeFallback), minInterval,
	defaultInterval,
	/exitAfterTimeout=/!continueAfterTimeout);

	std::optional<sdbusplus::bus::match_t> watchPostcodeMatch;
	if (watchPostcodes)
	{
	watchPostcodeMatch.emplace(
	bus,
	sdbusplus::bus::match::rules::propertiesChanged(
	"/xyz/openbmc_project/state/boot/raw0",
	"xyz.openbmc_project.State.Boot.Raw"),
	std::bind(&Watchdog::resetTimeRemaining, std::ref(watchdog),
	false));
	}

	// Claim the bus
	bus.request_name(service.c_str());

	auto intCb = [](sdeventplus::source::Signal& s,
	const struct signalfd_siginfo*) {
	s.get_event().exit(0);
	};
	stdplus::signal::block(SIGINT);
	sdeventplus::source::Signal sigint(event, SIGINT, intCb);
	stdplus::signal::block(SIGTERM);
	sdeventplus::source::Signal sigterm(event, SIGTERM, std::move(intCb));
	return sdeventplus::utility::loopWithBus(event, bus);
	}
	catch (const InternalFailure& e)
	{
	phosphor::logging::commit<InternalFailure>();

	// Need a coredump in the error cases.
	std::terminate();
	}
	return 1;
	}